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Add 2in9 example

embedded-hal-1.0
Chris 2018-10-23 23:15:23 +02:00
parent 0204e72cb5
commit c98c058c5a
2 changed files with 212 additions and 0 deletions
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14
examples/embedded_linux_epd2in9/Cargo.toml Normal file
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[package]
name = "embedded_linux_eink_example"
version = "0.1.0"
authors = ["Christoph Groß <christoph-gross@mailbox.org>"]
[dependencies]
eink_waveshare_rs = { path = "../../", default-features = false, features = ["epd2in9", "graphics"]}
linux-embedded-hal = "0.2.0"
embedded-graphics = "0.4.3"
embedded-hal = { version = "0.2.1", features = ["unproven"] }

198
examples/embedded_linux_epd2in9/src/main.rs Normal file
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// the library for the embedded linux device
extern crate linux_embedded_hal as lin_hal;
// the eink library
extern crate eink_waveshare_rs;
use eink_waveshare_rs::{
epd2in9::{
EPD2in9,
Buffer2in9,
},
graphics::{Display, DisplayRotation},
prelude::*,
};
use lin_hal::spidev::{self, SpidevOptions};
use lin_hal::{Pin, Spidev};
use lin_hal::sysfs_gpio::Direction;
use lin_hal::Delay;
extern crate embedded_graphics;
use embedded_graphics::coord::Coord;
use embedded_graphics::fonts::{Font6x8};
use embedded_graphics::prelude::*;
//use embedded_graphics::primitives::{Circle, Line};
use embedded_graphics::Drawing;
extern crate embedded_hal;
use embedded_hal::prelude::*;
// activate spi, gpio in raspi-config
// needs to be run with sudo because of some sysfs_gpio permission problems and follow-up timing problems
// see https://github.com/rust-embedded/rust-sysfs-gpio/issues/5 and follow-up issues
// DigitalIn Hack as long as it's not in the linux_embedded_hal
// from https://github.com/rudihorn/max31865/blob/extra_examples/examples/rpi.rs
// (slightly changed now as OutputPin doesn't provide is_high and is_low anymore)
use embedded_hal::digital::{InputPin};
//TODO: Remove when linux_embedded_hal implements InputPin
struct HackInputPin<'a> {
pin: &'a Pin
}
//TODO: Remove when linux_embedded_hal implements InputPin
impl<'a> HackInputPin<'a> {
fn new(p : &'a Pin) -> HackInputPin {
HackInputPin {
pin: p
}
}
}
//TODO: Remove when linux_embedded_hal implements InputPin
// for now it defaults to is_low if an error appears
// could be handled better!
impl<'a> InputPin for HackInputPin<'a> {
fn is_low(&self) -> bool {
self.pin.get_value().unwrap_or(0) == 0
}
fn is_high(&self) -> bool {
!self.is_low()
}
}
//TODO: Test this implemenation
//BE CAREFUL: this wasn't tested yet
fn main() {
run().unwrap();
}
fn run() -> Result<(), std::io::Error> {
// Configure SPI
// SPI settings are from eink-waveshare-rs documenation
let mut spi = Spidev::open("/dev/spidev0.0").expect("spidev directory");
let options = SpidevOptions::new()
.bits_per_word(8)
.max_speed_hz(4_000_000)
.mode(spidev::SPI_MODE_0)
.build();
spi.configure(&options).expect("spi configuration");
// Configure Digital I/O Pin to be used as Chip Select for SPI
let cs_pin = Pin::new(26);//BCM7 CE0
cs_pin.export().expect("cs_pin export");
while !cs_pin.is_exported() {}
cs_pin.set_direction(Direction::Out).expect("cs_pin Direction");
cs_pin.set_value(1).expect("cs_pin Value set to 1");
// Configure Busy Input Pin
let busy = Pin::new(5);//pin 29
busy.export().expect("busy export");
while !busy.is_exported() {}
busy.set_direction(Direction::In).expect("busy Direction");
//busy.set_value(1).expect("busy Value set to 1");
let busy_in = HackInputPin::new(&busy);
// Configure Data/Command OutputPin
let dc = Pin::new(6); //pin 31 //bcm6
dc.export().expect("dc export");
while !dc.is_exported() {}
dc.set_direction(Direction::Out).expect("dc Direction");
dc.set_value(1).expect("dc Value set to 1");
// Configure Reset OutputPin
let rst = Pin::new(16); //pin 36 //bcm16
rst.export().expect("rst export");
while !rst.is_exported() {}
rst.set_direction(Direction::Out).expect("rst Direction");
rst.set_value(1).expect("rst Value set to 1");
// Configure Delay
let mut delay = Delay {};
// Setup of the needed pins is finished here
// Now the "real" usage of the eink-waveshare-rs crate begins
let mut epd = EPD2in9::new(&mut spi, cs_pin, busy_in, dc, rst, &mut delay)?;
// Clear the full screen
epd.clear_frame(&mut spi).expect("clear frame 1");
epd.display_frame(&mut spi).expect("disp 1");
println!("Test all the rotations");
let mut buffer = Buffer2in9::default();
let mut display = Display::new(epd.width(), epd.height(), &mut buffer.buffer);
display.set_rotation(DisplayRotation::Rotate0);
display.draw(
Font6x8::render_str("Rotate 0!")
.with_stroke(Some(Color::Black))
.with_fill(Some(Color::White))
.translate(Coord::new(5, 50))
.into_iter(),
);
display.set_rotation(DisplayRotation::Rotate90);
display.draw(
Font6x8::render_str("Rotate 90!")
.with_stroke(Some(Color::Black))
.with_fill(Some(Color::White))
.translate(Coord::new(5, 50))
.into_iter(),
);
display.set_rotation(DisplayRotation::Rotate180);
display.draw(
Font6x8::render_str("Rotate 180!")
.with_stroke(Some(Color::Black))
.with_fill(Some(Color::White))
.translate(Coord::new(5, 50))
.into_iter(),
);
display.set_rotation(DisplayRotation::Rotate270);
display.draw(
Font6x8::render_str("Rotate 270!")
.with_stroke(Some(Color::Black))
.with_fill(Some(Color::White))
.translate(Coord::new(5, 50))
.into_iter(),
);
// Display updated frame
epd.update_frame(&mut spi, &display.buffer()).unwrap();
epd.display_frame(&mut spi).expect("display frame new graphics");
delay.delay_ms(5000u16);
// a quickly moving `Hello World!`
display.set_rotation(DisplayRotation::Rotate0);
epd.set_lut_quick(&mut spi).expect("SET LUT QUICK error");
let limit = 20;
for i in 0..limit {
println!("Moving Hello World. Loop {} from {}", (i+1), limit);
display.draw(
Font6x8::render_str(" Hello World! ")
.with_style(Style {
fill_color: Some(Color::White),
stroke_color: Some(Color::Black),
stroke_width: 0u8, // Has no effect on fonts
})
.translate(Coord::new(5 + i*6, 50))
.into_iter(),
);
epd.update_frame(&mut spi, &display.buffer()).unwrap();
epd.display_frame(&mut spi).expect("display frame new graphics");
}
// Set the EPD to sleep
epd.sleep(&mut spi).expect("sleep");
Ok(())
}